USER-DEFINED CLASSES AND ADTS - Java Programming: From Problem Analysis to Program Design - page 493

public Inventory(String n) //Constructor 2

{

name = n;
itemNum = -1;
price = 0.0;
unitsInStock = 0;

}

public Inventory(String n, int iNum,
double cost) //Constructor 3

{

name = n;
itemNum = iNum;
price = cost;
unitsInStock = 0;

}

public Inventory(String n, int iNum, double cost,
int inStock) //Constructor 4

{

name = n;
itemNum = iNum;
price = cost;
unitsInStock = inStock;

}

8

//Add additional methods

}
This class has four constructors and four instance variables.
Consider the following declarations:
Inventory item1 = new Inventory();
Inventory item2 = new Inventory("Dryer");
Inventory item3 = new Inventory("Washer", 2345, 278.95);
Inventory item4 = new Inventory("Toaster", 8231, 34.49, 200);
For item1 , the default constructor in the line labeled //Constructor 1 executes
because no value is passed to this variable. For item2 , the constructor in the line
labeled //Constructor 2 executes because only one parameter, which is of type
String , is passed and it matches with that constructor. For item3 , the constructor
in the line labeled //Constructor 3 executes because three parameters are passed to
item3 and they match with that constructor. Similarly, for item4 , the constructor in
the line labeled //Constructor 4 executes (see Figure 8-14).